Rod or shaft packing



A. V. WALKER Nov. 4, 195;

K grg Patented Nov. 4, 1952 UNITED STATES PATENT OFFICE ApplicationDecember 13, 1949, Serial No. 132,724

1 Claim.

This invention relates to a seal for liquids and it is primarily anobject of the invention to provide a seal to prevent seepage of oil,water or other liquids beyond the applied seal.

It is also an object of the invention to provide a seal of this kind foruse in a stuffing box for a shaft, stern and rudder tubes on boats.

A particular object of the invention is to provide a seat embodyingrings of compressible material, such as neoprene, with metallic ringsinterposed between adjacent neoprene rings and wherein the seal, inaddition to being adaptable to new units, may also be used in existingstuffing boxes for boat shafts or any other moving shaft in automotivevehicles etc.

The invention consists in the details of construction and in thecombination and arrangement of the several parts of my improved seal forliquids, whereby certain advantages are attained, as will be hereinaftermore fully set forth.

In order that my invention may be better understood, I will now proceedto describe the same with reference to the accompanying drawings,wherein:

Figure 1 is a view partly in section and partly in elevation of a sealconstructed in accordance with an embodiment of the invention andapplied;

Figure 2 is a sectional view taken substantially on the line 2-2 ofFigure 1;

Figure 3 is a fragmentary view in section illustrating a modified formof seal; and

Figure 4 is a fragmentary view in section illustrating anotherembodiment.

As illustrated in the accompanying drawings B denotes a stufiing box ofa preferred type for a shaft S.

The seal A as a unit is annular and comprises the rings I of neoprene orother suitable compressible material with the metallic rings 2interposed between adjacent rings I with one ring 2 overlying the outerface of an end ring I. The rings I and 2 are flat or washer-like andeach of the rings 2 is provided therearound with the equi-distantlyspaced anchor holes 3 arranged substantially midway between the outerand inner peripheries of the ring I.

The rings I and 2 of the unit A are tied in by the pins 4 integral withthe rings I and which are tightly inserted in the anchor holes 3.

The rings I are substantially in duplicate as are the rings 2. Each ofthe rings I is of a thickness to provide the relatively broad outer andinner edge faces to assure effective contact with inner wall of theboxing B and with the periphery of the shaft S. The ring initially is ofa major diameter in excess of the diameter of the box, said excesspreferably being four ten-thousandths per inch of the diameter of thebox. The central opening of the member I is also initially of a diameterless than the diameter of the shaft S preferably four ten-thousandthsper inch of the diameter of the shaft.

Each of the rings 2 has its fiat band of a width preferably two-thirdsof the corresponding dimension of the band of a ring I and the rings Iand 2 are preferably of the same thickness.

The unit A may be fabricated from sheets of neoprene and metal but ispreferably cast. By casting, the neoprene will adhere to the metal ringsmuch better than the fabricated type.

When cast, the pins 4 are integral with the adjacent rings I. Whenfabricated the pins 4 are integral with each ring and of a lengthsubstantially one-half of the length of an anchor hole 3.

The purpose of the seal as herein embodied is to have a snug fit betweenthe shaft S and the wall of the box B or the like. After initialapplication of the seal A, the same is compressed, as by the gland nut Nthereby squeezing the neoprene rings I into a still closer fit. Thepercentage of compression may be increased or decreased at the job byuse of additional rings I.

In the embodiment of the invention as shown in Figure 3 of the drawings,the outer marginal portion of the neoprene or compressible member orring 5 is formed to provide a surrounding head 6 substantially circularin cross section and of a major diameter greater than the thickness ofthe member or ring 5.

In the form of the invention comprised in Figure 4, the peripheralmarginal portion of the compressible or neoprene member or ring 'I isoppositely beveled, as at 8.

From the foregoing description it is thought to be obvious that a sealfor liquids constructed in accordance with my invention is particularlywell adapted for use by reason of the convenience and facility withwhich it may be assembled and operated.

I claim:

In a rod or shaft packing, a plurality of annular elements of acompressible material, a like number of annular metal elements of alesser diameter than that of the first elements each having a circularseries of holes concentrically disposed with respect to the perimeterthereof, said metal elements, except one, being interposed between andin contact with the first elements, said one metal element beingdisposed 3 4 against the outer of the first elements at the REFERENCESCITED outer end of the assembly and pins integral with The followingreferences are of record in the and extending from opposite sides ofcertain file of this patent; of the first elements and fitting in thesaid holes of adjacent metal elements, the compressible 5 UNITED STATESPATENTS element at the inner end of the assembly having Number Name Dateintegral pins on its inner side only fitting in the! 869,374 Law Oct.29, 1907 holes of the immediately adjacent metal ele- 1,005,954 FritzOct. 17, 1911 ment, said pins being of approximately one-half 1,018,333Meyer 1 Feb 20, 1912 of the length of the said holes in which they 101,488,695 Miller ;s 1 Apr. 1, 1924 are fitted. 1,969,008 Hubbard Aug. 7,1934 2,027,653 Roye Jan. 14, 1936 ARNOLD V. WALKER. 2,255,829 Spang eta1. Sept. 16, 1941

